#pragma once

#include <cstdint>
#include <filesystem>
#include <string>

#include <mw/http_server.hpp>
#include <mw/error.hpp>
#include <mw/url.hpp>

/// Supported authentication email delivery mechanisms.
enum class EmailTransport
{
    MAILJET,
    FILE
};

/// Validated authentication email configuration.
struct EmailConfig
{
    /// Selected delivery mechanism.
    EmailTransport transport = EmailTransport::FILE;

    /// Sender address used by Mailjet.
    std::string from_address;

    /// Human-readable sender name used by Mailjet.
    std::string from_name;

    /// Environment variable containing the Mailjet API key.
    std::string mailjet_api_key_environment;

    /// Environment variable containing the Mailjet secret key.
    std::string mailjet_secret_key_environment;

    /// Persistent daily ceiling for attempted Mailjet calls.
    std::uint32_t daily_attempt_limit = 180;

    /// Private file receiving the latest development link.
    std::filesystem::path link_file;
};

/// Validated process configuration.
struct Config
{
    /// Normalized absolute HTTP or HTTPS application base URL.
    mw::URL base_url;

    /// TCP or Unix-domain address on which the server listens.
    mw::HTTPServer::ListenAddress listen_address;

    /// Root containing application static files.
    std::filesystem::path static_root;

    /// SQLite database file path.
    std::filesystem::path database_path;

    /// Private root containing staged and published card assets.
    std::filesystem::path card_storage_root;

    /// ImageMagick quality used when converting PNG inputs to AVIF.
    int avif_quality;

    /// Long-side pixel count used for generated thumbnails.
    std::uint32_t thumbnail_long_side;

    /// Validated administrator email spelling.
    std::string administrator_email = "admin@example.com";

    /// Normalized immutable administrator identity key.
    std::string administrator_email_key = "admin@example.com";

    /// Maximum lazily accumulated pulls; lowering it can discard accrual.
    std::uint32_t maximum_accumulated_pulls = 3;

    /// Authentication email delivery configuration.
    EmailConfig email;
};

/// Load, validate, and normalize one TOML process configuration.
mw::E<Config> loadConfig(const std::filesystem::path& config_path);